From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E2E5C10F05 for ; Tue, 26 Mar 2019 20:11:35 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D59012070D for ; Tue, 26 Mar 2019 20:11:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="FZsDoNRb" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D59012070D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2A0A26B0003; Tue, 26 Mar 2019 16:11:34 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 22A7D6B0005; Tue, 26 Mar 2019 16:11:34 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0F3A16B0006; Tue, 26 Mar 2019 16:11:34 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) by kanga.kvack.org (Postfix) with ESMTP id C774C6B0003 for ; Tue, 26 Mar 2019 16:11:33 -0400 (EDT) Received: by mail-pl1-f200.google.com with SMTP id s22so2811011plq.1 for ; Tue, 26 Mar 2019 13:11:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding:dkim-signature; bh=culWY/Rk+vffcRaES9PIUDEE10WbDjvCzyyOH86GQbI=; b=iwNGarwhTI0KiqXrTLGmQtPVc9V3uWtLfW23uAnn/nMRQsJT9SW+iipb+MUypWgSQp YSNtp+s2m+vfsEhbeXKnjH6c0+Aggr37w1lDnmI+L/c/hzvl8Ke+kRUHwPT26LrKBPtX UHZbUYybqPBCXQKArvMi+R9Re5UuxVp2KEBqLpNATdAxL4wjzGTU9UtdX8JbWAUubfWn X7KMHtsYZcamqjlXH8YQMA2611d0zqzh1gTiifBUXWKHrbMJetBaSKal/hhe81nWfxiw 1tyZ00KLJ+GVQROPQIo+nHs+NGrKjpL6Iy9nMKMJn8hBTxpmlM2gJwQ1ucolcAIZOv2y USpg== X-Gm-Message-State: APjAAAUnj45DS+8NtfpUAoDGEYX1f4evyp570ogfsCN1Tig7GpAgDZTV mrMQcr/eRmCnHpwOSBeMRgIOetPfBj/6qeXB9ILGPbKyWlcjTWzl8Gf4SPTQZxIEyrA/PWdpJmA IKuVV8CYAoPeKjqlw2qx6/gQVXY0mIEEsZhi2ITCfcAS+pYb0d58A816dYDRQdBnIdA== X-Received: by 2002:a62:a509:: with SMTP id v9mr32504038pfm.64.1553631093459; Tue, 26 Mar 2019 13:11:33 -0700 (PDT) X-Google-Smtp-Source: APXvYqxjyHoughIOb5xDCEOWaNlcdcxL93hddcpUjFG4XWWDU1V4HA39srzSyVpmPFynsESS1SHS X-Received: by 2002:a62:a509:: with SMTP id v9mr32503973pfm.64.1553631092595; Tue, 26 Mar 2019 13:11:32 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1553631092; cv=none; d=google.com; s=arc-20160816; b=LvjX5klJgkX/g42Or2axjk6zfr6IPH0Yo5pZ7TE3AV6ZoFmc6YMpvtzvc3IL1GS2CH q1v6oVzKtjN3+00O9hy+U743d5Yd2qRENZE+6ZnjXsFyEFaGhOkkYmKaMBBTTqoGuyh+ FjD11CbFg+7syhB8nH8cjB8qgcrGDU9d/4B18nwwNaZOjknskzcse7Qmny6BdiBfP3dk AMANlfo9Dn1f8YYvwhRcvx0nwhbfaPSkPP3K7OJGLHtFVOxRTP09cv6t12Tj2gHCn/wI crTb8WuLQQ50epxdrIFd1RECzLgUGAVmQsPDBQmMAKGPS/DyikUz1dOyP4+YUoWEvnUn t2Jg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=dkim-signature:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:from:references :cc:to:subject; bh=culWY/Rk+vffcRaES9PIUDEE10WbDjvCzyyOH86GQbI=; b=VhoLZSIXqnpeqGIzy/SURIcJVQ0YjP+mTFxbdW5gy3gfeb9jrlAe4prOAd6avue78J TQ+VuxmuzHCnSax4VZ/SKUH0jWZC970jFiCvkqs15otHQlMI+MKGNfRs5WVtpeOKms4i KOK4z6YrLDNVMw3Atwi+u37Im209NmShVyriHBmjrBeqdtkyTCEitkb+dufA1wzyy+vt HKuff0FJR4QN4MDVET8cBbqYxbSnHAbEN6QmXaAa/otb2KxK8Nl9ZcCllVnXwxDlQx72 +WUCkiE3Q1Rb4keXkajQUmb5jmdtW7iVGr1KWvrfHoS9TXmF5w/0+1hjMWVSszJC7LOX uM0Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@nvidia.com header.s=n1 header.b=FZsDoNRb; spf=pass (google.com: domain of rcampbell@nvidia.com designates 216.228.121.64 as permitted sender) smtp.mailfrom=rcampbell@nvidia.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=nvidia.com Received: from hqemgate15.nvidia.com (hqemgate15.nvidia.com. [216.228.121.64]) by mx.google.com with ESMTPS id y2si17072727pll.133.2019.03.26.13.11.32 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 Mar 2019 13:11:32 -0700 (PDT) Received-SPF: pass (google.com: domain of rcampbell@nvidia.com designates 216.228.121.64 as permitted sender) client-ip=216.228.121.64; Authentication-Results: mx.google.com; dkim=pass header.i=@nvidia.com header.s=n1 header.b=FZsDoNRb; spf=pass (google.com: domain of rcampbell@nvidia.com designates 216.228.121.64 as permitted sender) smtp.mailfrom=rcampbell@nvidia.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=nvidia.com Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Tue, 26 Mar 2019 13:11:27 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Tue, 26 Mar 2019 13:11:31 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Tue, 26 Mar 2019 13:11:31 -0700 Received: from rcampbell-dev.nvidia.com (172.20.13.39) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 26 Mar 2019 20:11:31 +0000 Subject: Re: CONFIG_DEBUG_VIRTUAL breaks boot on x86-32 To: William Kucharski , Meelis Roos CC: LKML , References: <4d5ee3b0-6d47-a8df-a6b3-54b0fba66ed7@linux.ee> From: Ralph Campbell Message-ID: Date: Tue, 26 Mar 2019 13:11:31 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: X-Originating-IP: [172.20.13.39] X-ClientProxiedBy: HQMAIL103.nvidia.com (172.20.187.11) To HQMAIL101.nvidia.com (172.20.187.10) Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1553631087; bh=culWY/Rk+vffcRaES9PIUDEE10WbDjvCzyyOH86GQbI=; h=X-PGP-Universal:Subject:To:CC:References:From:Message-ID:Date: User-Agent:MIME-Version:In-Reply-To:X-Originating-IP: X-ClientProxiedBy:Content-Type:Content-Language: Content-Transfer-Encoding; b=FZsDoNRbAc/4HIAqnX+Vhp3z8GG7gJK9XpzbJ0o2AgUmo77iMdqmeGf4hsqJirXFz KD9YQx8cyDZO2zOa5KWXzLwhqJrh9hJBmbOral0aoQpkDeXzt0B4yZmiPBrBnFDpTp TnBXlS8XB16psg0eMYJrReNvKrHk6g9aM/ARYSLDwVek7HIhpN97BE635DArVyfjQp WFVjSAb0n+pK7VZWXuU0w31wIiDT1wdFIQNJDcS53JFHb9WI3LujqgV1CRBoqOM7Oq JzBMHcvXLsGogWedfKMpP8GzGvjLl6TmCN5uCvZ/aUTFacBwemf5G75ZNiWaQUxG5I 5a14bPxDCOjPA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 3/26/19 6:52 AM, William Kucharski wrote: > Does this still happen on 5.1-rc2? > > Do you have idea as to what max_low_pfn() gets set to on your system at boot time? > > From the screen shot I'm guessing it MIGHT be 0x373fe, but it's hard to know for sure. > > >> On Mar 21, 2019, at 2:22 PM, Meelis Roos wrote: >> >> I tried to debug another problem and turned on most debug options for memory. >> The resulting kernel failed to boot. >> >> Bisecting the configurations led to CONFIG_DEBUG_VIRTUAL - if I turned it on >> in addition to some other debug options, the machine crashed with >> >> kernel BUG at arch/x86/mm/physaddr.c:79! >> >> Screenshot at http://kodu.ut.ee/~mroos/debug_virtual-boot-hang-1.jpg >> >> The machine was Athlon XP with VIA KT600 chipset and 2G RAM. >> >> -- >> Meelis Roos >> > You might be hitting a bug I found. Try applying this patch: https://marc.info/?l=linux-kernel&m=155355953012985&w=2